Manufacture of a non-saponifiable unsaturated hydrocarbon oil from a drying-oil.



"r rare Para;

BENJAMIN T. BROOKS AND FRED W. PADGETT, O1? PITTSBURGH, PENNSYLVANIA, ASSIGNORS TO GULF REFINING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A

CORPORATION OF TEXAS.

MANUFACTURE OF ANON-SAPONIFIABLE 'UNSATURATED HYDROCARBON 011i FROM A DRYING-OIL.

Patented Mar. 2'3, 1917.

1,22() 82(). Specification of Letters Patent.

No Drawing. Application filed August 10, 1914. Serial N 0. 855,982.

To all whom it may concern:

Be it known that we, BENJAMIN T. BROOKS and FRED W. PADGETI, both citizens of the United States, and residing at Pittsburgh, Allegheny county, State of Pennsylvania, have invented certain new and useful Improvements in the Manufacture of a Non-Saponifiable Unsaturated Hydrocau' ing oil, the resultant product having, as one of its principal uses the capacity of furnishing a suitable non-saponifiable substitute for linseed oil in the making up of paint compounds. The non-saponifiable character of the product permits it to be used to particular advantage in p nt compounds intended for application to surfaces of concrete, cement, and the like, wherein the lime present exerts a saponifying action upon the oleaginous vehicle usually employed and tends to cause the applied layer of paint to peel off.

In accordance with the invention, the,

product may be obtained in a number of different Ways. For instance, a lime salt or soap may be distilled, preferably in 'vacuo (say 20 m. m.), with free lime, in accordance with the equation Or, an aqueous solution of an alkali soap (potash or soda soap) may be electrolyzed,

' according to the following equationz- 2. nonzcoiuwmo-asonaq-combos.

high temperatures, (as, for instance, 400 C. to 500 (1,) according to the equation In the three foregoing equatigms, the symbol It refers to a hydrocarbon radical containing 2 double bonds.

The product produced, in each of these instances, is an unsaturated hydrocarbon oil, which is non-saponifiable and non-volatile in the sense that it will suffer no appreciable evaporation loss until it sets to a hard film (such as is given by linseed oil) after it has absorbed oxygen from the air to the requisite amount.

While we have referred specifically to the manufacture of the product from linseed oil, it will be understood that it may also beproduced from other drying oils such as china-wood oil, by similarly removing there from the acid or carbon dioxid group.

What we claim is: I

1. The method of producing from drying oils unsaturated hydrocarbons havingvaluable film-forming properties which comprises splitting oif carbon dioXid from the free fatty acids of said oils; substantially as described.

2. The method of producing from drying oils unsaturated hydrocarbons having yaluable film-forming properties which comprises splitting off carbon dioxid from the free fatty acids of said oils by heating in the presence of a metal o'xid; substantially as describe. I

3. 'he method of producing from linseed ilnnsaturated hydrocarbons having valuable film-forming properties which com prises splitting oii' carbon dioxid from the free fatty acids of said oil; substantially as to the free fatty acids of a drying oil after the splitting off of carbon dioXid therefrom,

said hydrocarbon oil having valuable film forming properties and being a valuable substitute for linseed oil; substantially as 7 described.

5. As a new article of manufacture, an

unsaturated hydrocarbon oil corresponding to-the free fatty acids of linseed oil after the splitting off of carbon dioxid therefrom, said hydrocarbon oil having valuable filmforming properties and being a valuable substitute for linseed oil; substantially as described.

. In testimony whereof we afiix our signa- 15 tures, in presence of two witnesses. 

